Derrick



J. E. GADBOIS DERRICK Filed Nov. 28. -1932 April 24, 1934.

2 Sheets-Sheet l w n E ELL- 1.777 :z -ELL...

BY M@ ATTORNEY.

April 24,1934.

J. E. GADBOIS DERRICK Filed Nov. 28, 1932 2 Sheets-Sheet 2 ATTORNEY.

patented pr. 24, 1.934

UNITED STATES PATENTv OFFICE 12 Claims.

r)This invention relates to improvements in hoisting apparatus and isdirected more particularly to improvements in derricks.

The principal objects of the invention are directed to a derrickstructure including novel means for rotating the derrick., other meansfor extending the boom and means for transporting or moving thederrickas from one lloor to the next.

The objects of the invention are accomplished by the provision of anovel combination and arrangement of parts to be more fully hereinafterreferred to in connection with the accompanying description of thepresent preferred form thereof taken in connection with the accompanyingdrawings, wherein;

Fig. 1 is an elevational view of a derrick structure embodying the novelfeatures of the invention.

Fig. 2 is a sectional View on the line 2 2 of Fig. 1.

Fig. 3 is a sectional plan view on the line 3 3 of Fig. 1.

Fig. 4 is a sectional plan view on the line 4 4 of Fig. 1. Fig. 5 is asectional plan view on the line 5 5 of Fig. 1.

Fig. 6 is a sectional View on the line 6 6 of Fig. 5.

Fig. 7 is a partial inverted plan view of the support shown in Fig. 4.

Fig. 8 is a small scale diagrammatic view to show certain features ofthe invention, and

Fig. 9 is a side elevational view of the base and support of thederrick.

Referring now to the drawings more in detail the invention will be fullydescribed.

In Fig. 1 there is shown a mast 2 having a boom 4 pivoted thereto at `6.The mast 2 rests on and rotates relative to a base 8 which also islocated over a support 10.

Vertical beams 14 and horizontal beams 16 which represent parts of abuilding and a cross member 18 is shown as being supported by thehorizontal members 16. These are shown to as.-

` sist in a disclosure of certain features of the invention.

The boom 4 may consist of a tubular member lmade from fabricatedmaterial and has slidable therein an extension 7. A pulley block 9 atthe outer end of the boom receives a cable represented by dotted linesl1 which cable may pass downwardly through the mast and be wound up on awinch whereby the boom may be swung on its pivotal connection with themast. The mast its other end may pass through the boom and mast to thewinch or other operating mechanism. The extension 7 may take any desiredform such as a hollow tube-like member so as to be light but strong andrigid for sliding in the boom.

A screw rod 17 is in engagement with a part of the extension 7 such asan end wall 19 thereof, (see Fig. 2). A crank 21 at one side of the'boom 4 and a gear 23 are xed to a shaft 25 which is journalled in theboom. The gear 23 meshes with another gear 27 fixed to the screw rod 17.By rotating the crank 21 the screw rod is rotated so as to move theextension back and forth relative to the boom and in this way move theouter end thereof so that the boom structure may be varied in length asis desirable in connection with the operation of the derrick.

The base 8 includes an upper plate 22 on which* the lower end of themastkis seated for rotative movements and is hollowed out as shown inFig. 6. A shaft 24 is journalled in a suitable bearingr26 of the baseand has a gear 28 on its inner end which meshes with a gear 30. The gear30 is internally screw threaded to receive a screw rod 32 and a crank 34on the outer end of the shaft 24 is provided for turning the shaft 24and gear 28 to rotate the gear 30 and thereby move the rod 32 up anddown.

A ratchet wheel 35 is carried by the shaft 24 and a pawl 37 is pivotedat 39 to the base. As shown in Fig. 5 the pawl 35 is disengaged from theratchet wheel but it may be swung into engagement therewith tol preventrotation of the shaft in one direction.

The Support 10 as shown in Figs. 4 and 7 has a shaft 40 journalledtherein and a gear 42 on the inner end of the shaft is disposed in anopening 46 extending through the support. The gear 42 is in mesh with amating gear 48 to which the threaded rod 32 his xed and the lower end 33of the rod 32 is journalled in a bracket 50 in the opening of thesupport. Ratchet wheels 52 and 54 are carried by the shaft 40 and pawls56 and 58 are pivoted to the support for swinging movements so as toengage the ratchet wheels. By engaging the pawls with the ratchets theshaft 40 may be held against rotation in one way or the other. Byengaging both o f them the shaft 40 may be held against rotation ineither direction.

A crank 60 is carried on the outer end of shaft 40 to facilitaterotation of the shaft and a pulley 62 is secured thereto which may bebelted to a driving means such as a motor, engine or the like.

The operation of the mechanism just described will be explained inconnection with Figs. 1 and 8. As shown in Fig. 1 the support unit i0rests on a cross member 18 which in turn is supported by horizontalbeams 16. It will be assumed that the beams 16 represent the beams ofone licor of a building and that it is desired to transport the derrickfrom said floor to a floor above where the derrick is to be used inconnection with work on the said floors.

To accomplish this the shaft 24 of the base is held against rotation bymeans of the ratchet and pawls 35 and 37 which holds the gear 30, in

which the rod 32 is screw threaded, against rota-V tion. The shaft 40 insupport 10 is rotated by means of the crank 60 or by power means fordriving the pulley so as to rotate gear 42 and gear 48 and therebyrotate the threaded rod 32. In this way the rod 32 is screwed into gear30 so that base 8 is elevated to a point above the horizontal beams 70representing part of an upper floor level.

When in this elevated position blocking of some sort such as representedby 72 and 74 is placed on beams 70 to underlie and support the base 8.The shaft 24 of the base is then rotated to rotate gear 30 for screwingthe rod 32 through the gear 30 thus drawing support 10 upwardly so thatit underlies the base 8. Guides 76 on the support are receivable inopenings 77 of the base 8 so as to position the base and supportproperly relative to one another. When the support has been raised tounderlie the base, suitable supporting members may be placed beneath thesupport 10 and on top of beams 70 to support the support 10 and basethereabove after which the blocking 72 and 74 may be removed. In thisway the derrick may be moved from a lower floor to a iioor thereaboveand the derrick may be positioned for use in connection with the iioorto which it is moved. The guides 'i6 are preferably threaded forreceiving nuts 20 that the base and support may be clamped together.Clamp straps '79 are provided which have clamp screws 80 at the lowerends thereof so that the support 10 may be secured to a beam 18 or thelike.

Novel means for rotating the mast is provided (see Figs. l and 3), andconsists of the following:

A circular member 90 is supported by uprights 92 on the base 10 which isslotted as at 94. A clamping member 96 passes through the slot 94 andhas a head 98 on its inner side. A washer 100 is loosely disposed on themember 96 and a clamping member 102 is screw threaded on the member 96.A shaft 104 is journalled in the member 96 and carries a gear 106 on itsinner end and an operating wheel 108 on its outer end. A gear 110 isassociated with the mast which meshes with gear 106. By rotating thewheel 108 and shaft 104 the mast is rotated on its axis.

By loosening the clamping means consisting of the parts 96, 98 and 102the shaft together with gear 106 and wheel 108 may be moved about theaxis of the mast, the part 96 being slidable in the slot 94. In this waythe operating means for rotating the mast may be moved to variouspositions and then the mast may be rotated from the adjusted position ofthe shaft.

A second circular member 112 similar to the member 92 may be associatedwith the supports 92 and the shaft 104 or a part associated with thegear 106 may be slidable in a slot in said member 112. This will act asan inner journal for the shaft and gear and tend to steady the same forits rotative movements.

From the foregoing it will be seen that the boom may be extended bymeans of the relatively slidable boom extension and that the same isoperable by movements of the crank. It will be noted that the means forrotating the boom may be moved to various positions about the axis ofthe derrick to various positions of adjustment.

As a further feature it will be noticed that it is possible to move theentire structure from one floor to another thus overcoming thedifficulties and eliminating the expense now necessary in dismantling aderrick structure for the purpose of so moving it.

Various changes may be made in the form of the invention withoutdeparting from the spirit and scope thereof, and therefore it ispreferred to be limited, if at all, by the appended claims rather thanby the foregoing description.

What is claimed is:

1. A derrick comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a screw rodassociated with said base and support, means asso-V away from saidsupport by rotation of the rod,A and means associated with said threadedmember for rotating the saine to move the support relative to the base.

2. A derrick comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a rotatable screwrod associated with said base and support, a shaft associated with saidsupport, driving connections between said shaft and rod, a shaftassociated with said base, a rotatable internally threaded memberreceiving said rod operably connected to said last named shaft, meansfor rotating said shafts and means for holding the same againstrotation.

3. A derrick comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a rotatable screwrod associated with said base and support, a shaft associated with saidsupport, driving connections between said shaft and rod, a shaftassociated with said base, a rotatable internally threaded memberreceiving said rod operably connected to said last named shaft, meansfor rotating saidl shafts, means for holding the same against rotationand guides on said support receivable in guideways provided in saidbase.

4. A derrick comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a rotatable screwrod extending upwardly from said support through said base and into saidmast, means associated with said support for rotating said screw, meansfor holding the same against rotation, a gear rotatable in said base inthreaded engagement with said rod, means associated with said base forrotating said gear, means for holding said means against rotation, alladapted and arranged whereby the base and mast may be moved upwardlyfrom said support and the base supported at a distance above saidsupport and the support may move upwardly towards said base.

5. A derricl; comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a rotatable screwrod extending upwardly from said support through said base and into saidmast, means associated with said support for rotating said screw, meansfor holding the same against rotation, a gear rotatable in said base inthreaded engagement with said rod, rotatable means associated with saidbase for rotating said gear, means for holding said rotatable meansagainst rotation, all adapted and arranged whereby the base and mast maybe moved upwardly from said support, and the base supported at adistance above said support and the support may move upwardly towardssaid base and means associated with said base and support for guidingthem as they are moved into engagement with one another.

6. A derrick comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a screw rodrotatable in said support extending through said base and into saidmast, an operating shaft in said support, driving connections betweensaid shaft and said screw whereby the screw is rotated by the shaft, agear rotatable in said base in screw threaded engagement with saidscrew, an operating shaft associated with said base having a gear inengagement with said first-named gear, and means associated with saidoperating shaft and base adapted and arranged to hold the same againstrotation or to permit rotative movements thereof.

7. A derrick comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a screw rotatable1n said support extending through said base and into said mast, anoperating shaft in said support, driving connections between said shaftand said screw whereby the screw is rotated by means of the shaft, agear rotatable in said base in screw threaded engagement with saidscrew, an operating shaft associated with said base having a gear inengagement with said first-named gear and means associated with saidoperating shaft and base adapted and arranged to hold the same againstrotation or to permit rotative movements thereof, and releasa-ble meansassociated with the operating shaft of the support to hold the sameagainst rotative movements.

8. A derrick comprising in combination, a base and a mast rotatablethereon, a support below and separate from said base, a screw rodrotatably mounted in said support extending through said base and intosaid mast, an operating shaft rotatable in said support, interengaginggears associated with said shaft and screw rod. means associated withsaid support and shaft to hold the said shaft against rotation in eitherdirection or to permit free rotative movements thereof, a gear in saidbase in threaded engagement with said screw rod, an operating shaftrotatable in said base, a gear thereon in engagement with said gear andengageable means associated with said operating shaft and base to holdsaid shaft against rotation or permit rotative movements thereof.

9. A derrick comprising in combination, a base having a mast rotatablethereon, a support below and separate from said base, a screw rodrotatably mounted in said support extending through said base andupwardly into said mast, an operating shaft rotatable in said support,operative connections between said shaft and rod, an operating shaftrotatable in said base, a drive gear thereon, and a driven gear inengagement with said drive gear in screw threaded engagement with saidscrew rod, all adapted and arranged whereby the operating shaft of thesupport and the operating shaft of the base may be operated to effectmovements of the base upwardly from the support and of the supportupwardly towards said base.

10. A derriclr comprising in combination, abase having a mast rotatablethereon, a support below and separate from said base, a screw rodrotatably mounted in said support extending through said base andupwardly into said mast, an operating shaft rotatable in said support,operative connections between said shaft and rod, an operating shaftrotatable in said base, a drive gear thereon, a driven gear inengagement with said drive gear in screw threaded engagement with saidscrew rod, and guiding means associated with said base and supportwhereby they are guided for relative movements, all adapted and arrangedwhereby the operating shaft of the support and the operating shaft ofthe base may be operated to effect movements of the base upwardly fromthe support and of the support upwardly towards said base.

1l. A derrick comprising in combination, a base having a mast rotatabletherein, a support below and separate from the base, a screw rodrotatable in the support extending upwardly through the base into themast, an operating shaft rotatable in the support, gear connectionsbetween said shaft and screw rod whereby the latter is rotated by theformer, an operating shaft rotatable in the base, a drive gear thereon,a driven gear meshing therewith in screw threaded engagement with saidscrew rod, means associated with said base and operating shaft thereofto hold said shaft against rotation, and means associated with saidsupport and operating shaft thereof to hold said shaft against rotation,all adapted and arranged whereby the operating shaft of the support maybe rotated to rotate the screw rod so that it is unscrewed from thedriven gear of the base which may be held against rotation to effect araising movement of the base from the support and whereby the operatingshaft of the support may be held against rotation and the operatingshaft of the base rotated to rotate the driven gear and screw the rodthereinto and effect a movement of the support towards said base.

l2. A derrick comprising in combination, a base having a mast rotatabletherein, a support below and separate from the base, a screw rodrotatable in the support extending upwardly through the base into themast, an operating shaft rotatable in the support, gear connectionsbetween said shaft and screw rod whereby the latter is rotated by theformer, an operating shaft rotatable in the base, a drive gear thereon,a driven gear meshing therewith in screw threaded engagement with saidscrew rod, means associated with said base and operating shaft thereofto hold said shaft against rotation, means associated with said supportand operating shaft thereof to hold said shaft against rotation, andguiding means associated with said base and support, all adapted andarranged whereby the operating shaft of the support may be rotated torotate the screw rod so that it is unscrewed from the driven gear of thebase which may be held against rotation to effect a raising movement ofthe base from the support and whereby the operating shaft of the supportmay be held against rotation and the operating shaft of the base rotatedto rotate the driven gear and screw the rod thereinto and effect amovement of the support towards said base.

JOSEPH E. GADBOIS.

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